Purpose With Clear you can reset a variable to its inital value "". When you specify a SAP data dictionary structure the type-dependent initial value is used, e.g. "00000000" for a date field.

Within structures components of ABAP types C, P, N, D, and  T are supported. All other types such as floating point numbers  are handled as Type-C-fields and reset to Space.
Examples

Further examples
Clear V[init]

The variable is deleted. The value "" will be returned when reading it later.

Clear V[VA01_*]

All variables whose names start with VA01_ are deleted.

Clear text[description]

The long text obtains the value  "".

Clear V[wa](BAPIMEREQITEMIMP)

The variable obtains the initial values according to the SAP data dictionary structure BAPIMEREQITEMIMP.

Clear V[wa](BAPIMEREQITEMIMP-QUANTITY)

Component QUANTITY in V[wa] is set to its initial value according to structure BAPIMEREQITEMIMP; in this case 0 in packed decimal format.

Format
Clear Deletes the variable varname
Clear Deletes all variables whose names start with varname
Clear Sets the initial values according to structure STRUCNAME
Clear Sets the initial vlaue of component FLDNAME according to structure STRUCNAME
Components InputAssistant